tls_hooks.h
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 /*
  * $Id$
  *
  * Copyright (C) 2007 iptelorg GmbH 
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 /*
  * tls hooks for modules
  *
  * History:
  * --------
  *  2007-02-09  created by andrei
  */
 
 #ifndef _tls_hooks_h
 #define _tls_hooks_h
 
 #ifdef TLS_HOOKS
 
 #ifndef USE_TLS
 #error "USE_TLS required and not defined (please compile with make \
 	TLS_HOOKS=1)"
 #endif
 
 #ifdef CORE_TLS
 #error "Conflict: CORE_TLS and TLS_HOOKS cannot be defined in the same time"
 #endif
 
 #include "tcp_conn.h"
 
 
 
 struct tls_hooks{
 	int  (*read)(struct tcp_connection* c);
 	int (*blocking_write)(struct tcp_connection* c, int fd, const char* buf,
 							unsigned int len);
 	int  (*on_tcpconn_init)(struct tcp_connection *c, int sock);
 	void (*tcpconn_clean)(struct tcp_connection* c);
 	void (*tcpconn_close)(struct tcp_connection*c , int fd);
 	/* checks if a tls connection is fully established before a read, and if 
 	 * not it runs tls_accept() or tls_connect() as needed
 	 * (tls_accept and tls_connect are deferred to the "reader" process for
 	 *  performance reasons) */
 	int (*fix_read_con)(struct tcp_connection* c);
 	
 	/* per listening socket init, called on ser startup (after modules,
 	 *  process table, init() and udp socket initialization)*/
 	int (*init_si)(struct socket_info* si);
 	/* generic init function (called at ser init, after module initialization
 	 *  and process table creation)*/
 	int (*init)();
 	/* destroy function, called after the modules are destroyed, and 
 	 * after  destroy_tcp() */
 	void (*destroy)();
 };
 
 
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 extern struct tls_hooks tls_hook;
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 #ifdef __SUNPRO_C
 	#define tls_hook_call(name, ret_not_set, ...) \
 		((tls_hook.name)?(tls_hook.name(__VA_ARGS__)): (ret_not_set))
 	#define tls_hook_call_v(name, __VA_ARGS__) \
 		do{ \
 			if (tls_hook.name) tls_hook.name(__VA_ARGS__); \
 		}while(0)
 #else
 	#define tls_hook_call(name, ret_not_set, args...) \
 		((tls_hook.name)?(tls_hook.name(args)): (ret_not_set))
 	#define tls_hook_call_v(name, args...) \
 		do{ \
 			if (tls_hook.name) tls_hook.name(args); \
 		}while(0)
 #endif
 
 /* hooks */
 
 #define tls_tcpconn_init(c, s)	tls_hook_call(on_tcpconn_init, 0, (c), (s))
 #define tls_tcpconn_clean(c)	tls_hook_call_v(tcpconn_clean, (c))
 #define tls_blocking_write(c, fd, buf, len) \
 	tls_hook_call(blocking_write, -1, (c), (fd), (buf), (len))
 #define tls_close(conn, fd)		tls_hook_call_v(tcpconn_close, (conn), (fd))
 #define tls_read(c)				tls_hook_call(read, -1, (c))
 #define tls_fix_read_conn(c)	tls_hook_call(fix_read_con, -1, (c))
 
 int register_tls_hooks(struct tls_hooks* h);
 
 #endif /* TLS_HOOKS */
 #endif